The Handheld Optical Laser Source is a testing device single-mode and/or multimode fiber networks in conjunction with an Optical Power Meter. It transmits constant wavelengths in one of the following colors and can send and receive two wavelengths for each test – doubling testing efficiency – reducing test time The Handheld Optical Laser Source is a newly designed fiber optic tester, it aims at fiber network installation, fiber network engineering acceptance, and fiber network maintenance. Further, they can be availed